Lenovo ThinkSystem SR860 V3 User Manual page 124

Figure 69. Installing crossbar
a. Align the rear guide pins on the crossbar and install it into the openings on the sides of the
chassis.
b. Rotate the crossbar towards the front of the server to secure it in place.
Step 2. Secure PCIe riser 1 to the crossbar.
Figure 70. Securing PCIe riser
a. Slightly lift the PCIe riser.
b. Close the kickstand(s).
c. Push the PCIe riser into the chassis until it is fully seated.
Step 3. Repeat Step 2 on page 114
Step 4. Connect all external cables to the PCIe adapters.
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to secure the other two PCIe risers.